On 11-Feb-17 11:28 AM, Ross Scanlon wrote:
On 11/02/17 07:00, Warin wrote:
The NSW LPT base map is particularly helpful for road classifications
.. tracks, unclassified, tertiary and paths.
It is in some ways better than a survey as it looks to take into
account the importance to the community and that is very hard to
determine by simply travelling the road.
Where a 'track' travels a long distance .. say over 50 km I would
argue that it is 'unclassified' as that length suggests it is not a
simple service/maintenance track but a connection between distant
points.
As far as seeking out the 'interesting/adventure' roads .. I first
look for unpaved, then connecting. The old 'Tracks for Australia'
garmin map is helpful but well out of date.
So your saying above that a track like the Canning Stock Route should
be an unclassified road? It's about 1800kms and is definitely a track
not a road. There are some sections you could possibly call an
unclassified road but they are not maintained. For the majority of
it's length it is two wheel tracks through the scrub and sand dunes.
I'd suggest everyone have a read of the wiki pages for track and
unclassified.
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dtrack
"roads for mostly agricultural use, forest tracks"
"classify them as usual
<http://wiki.openstreetmap.org/wiki/Highways#Classification> according
to the conventions in your country,"
"vehicular use is dominated by field access or forest management, but
not any heavier sort of industry. "
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dunclassified*
"*used for minor public roads typically at the lowest level of the
interconnecting grid *"
"*The least important sort of minor roads which are either a) proper
signposted formal parts of the public road network, or b) nominally
private or just unsignposted but the locals use them anyway. The idea is
that "4"-wheel vehicular use by the general public is possible, the
general public use dominates other uses, and no single specific purpose
dominates.*"
* These are not clear and there is suggestions to refer to the country
guidelines
http://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines#Unsealed_and_4wd_Roads_.28Dirt.2C_Gravel.2C_Formed.2C_etc.29
and that is not clear either.
I've always tagged them by looking to see if they are
maintained/graded. If they are graded, and that's generally pretty
obvious from aerial imagery as well, then they are minimum
unclassified. If not then they are tracks.
How frequently are they graded? Sections of the Canning are graded. A
track locally to me was recently graded .. last grading was probably
done 20 years ago ...but I'd not call it 'unclassified' as it is not
important enough. It is in quite good condition now.
Have a look at this area in josm, with bing imagery
http://www.openstreetmap.org/#map=15/-30.0090/116.8188
or here it is on bing maps:
https://binged.it/2kcYMV6
and where it's unsealed
https://binged.it/2kd8irh
Looking at the road that comes up from the south east and then
according to MRWA it continues to the north west.
MRWA classifies the south east part as osm tertiary and the north west
part as unclassified.
However I'd tag the north west part as track as it's little more than
two wheel tracks through the scrub and the further you go along it the
more it deteriorates.
The condition/difficulty of the road is best determined by travelling
the road, I don't add that detail unless I have travelled it. I do
add surface=unpaved/paved ...
on some bridges I remove the surface tag as I cannot be certain what
is there, on a few I change it to concrete.
On 10-Feb-17 05:55 PM, David Bannon wrote:
Do you mean without seeing them yourself Warren ? I personally
think that you should only correct another mapper's work if you have
personally seen something that needs correction. I am sure there are
some exceptions. But here, in particular, you seem to have
"negative" information.
Its also worth remembering that highway= indicates the purpose of
the road or track, a number of other tags indicate its condition. In
theory ....
David
On 10/02/17 10:51, Warren wrote:
I have asked this question before but did not really get a clear
answer.
I am working off the Western Australian Main Roads data checking
against the OSM road attributes. Occasionally I come across lines
that are classed in OSM as highway:unclassified or
highway:residential that do not appear on the Main Roads data base.
I would argue that these are named tracks rather than roads but I
wanted to check others opinion.
Do I leave them alone or change the classification to highway:track?
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